下面是李明同学完成的口算练习，其准确率为（）%．18÷3+58=123×2=4337+47+12=11713+14=11220÷75=2812×13÷12×13=1A.16.7B.33.3C.

Question

下面是李明同学完成的口算练习，其准确率为（　　）%．

(1)/(8)÷3+(5)/(8)=1	(2)/(3)×2=(4)/(3)	(3)/(7)+(4)/(7)+(1)/(2)=(11)/(7)
(1)/(3)+(1)/(4)=(1)/(12)	20÷(7)/(5)=28	(1)/(2)×(1)/(3)÷(1)/(2)×(1)/(3)=1

A. 16.7

B. 33.3

C. 50

D. 66.7

Answer 1

(1)/(8)÷3+(5)/(8)=1×	(2)/(3)×2=(4)/(3)√	(3)/(7)+(4)/(7)+(1)/(2)=(11)/(7)×
(1)/(3)+(1)/(4)=(1)/(12)×	20÷(7)/(5)=28×	(1)/(2)×(1)/(3)÷(1)/(2)×(1)/(3)=1×

1÷6×100%≈16.7%．
答：他这次口算的正确率约是16.7%．
故选：A．